Different lengths of interconnects ??????



Have you ever tried using a pair of interconnects in different lengths to connect preamp and mono block amps? Can it cause one channel delay or any phase problems?

My Preamp is placed on left side behind my active ATC speakers, but I always use a pair of interconnects in same length between my preamp and the built-in power amp of my speakers.

Now I have a chance to buy pair of Valhalla XLR interconnects in different lengths, one 1.7m and another 3.5m, from another city. They are just about the right length from my preamp to left and right channel of my speakers, and price is good. I am not sure if it is OK to use interconnects in this way. Anyone have this experience?

Many thanks!
zdeng
If you believe in physics and are not too anal regarding your audio setup, you could be fine. Here are the variables: there will be a timing delay but I challenge whether it would be audible in a perfect world. It is measurable but you are talking nanoseconds here. Also in a perfect world, you would be able to extrapolate that measured difference and move the speaker with the longer cable a millimeter or two closer to your listening position, mitigating the measured delay. Now with all of this used as a disclaimer, the mere fact that you are asking this question means that you will always be wondering whether you have a mismatch, which will drive you crazy. Either you recognize that there will be a measurable but "mechanically" insignificant delay or you recognize that it will likely not materially matter. But if you recognize that it will likely not "materially" matter than you will also then double guess the need for Valhallas....your ATC speakers are not wired with Valhalla's from the electronic crossover to the individual amps in each speaker and oh, by the way, have you opened up your speakers to check the lengths of the wire used inside them to make sure they are the same length?

The above text, while scientifically accurate simply highlights how obsessive we can become. Relax, if you want the cables, buy them. You will be unable to hear any timing differences and whether you hear other differences....well...I don't want to start any wars. Good luck.
No issue. Electrical signals travel very close to the speed of light. You cannot possibly hear the difference. Since these are line level signals then the voltage drop will be negligeable too (your speaker should have very high input impedance something like 10 K Ohms).

Generally XLR cables are made from 22 or 24 AWG wire so you are looking at 16 to 25 Ohms resistance per THOUSAND feet. So on a 100 foot cable you are looking at a voltage drop of 2.5/10,000 = 0.00025 volts on your 2 Volt reference signal hardly worth bothering about... it in fact at extreme lengths it is cable inductance/capacitance that you may worry about.

Remember studios use microphone cable lengths of 50 feet all the time and a concert may involve 100's of feet of XLR cabling across a stage and to the control booth.

There is absolutely no need to be concerned over a few feet.

(BTW There is also no need to spend more then 20 bucks on an XLR microphone cable in my opinion...Mogami for example make nice cables and these may cost you $50 bucks...generally good cables last longer and have better shielding, however shielding is not likely to be an issue for short runs)
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